Safety appliance for elevators.



-R.1..& c. L.. Rouw. SAFETY APPLIANCE FOR ELEVATORS.

APPLICATION FILED JULY 27| 1916.v

1,234,807 Patented. July 31, 1917.

UNITED STATES VPATENT OFFICE.

Bienen@ .i noone ,Ann Chinon L,- nonio, or onnnenn einironnni.

.SAFETY Ariiiienon non @enviaron/.S-

1.aeeeoe,

Speoioehoil of Leners .Patent Pannen vJuly 3.1, 19in Application filed J' 11151127, 19-16. Serial No. 111,597.

To all whom t may concern:

Be it known that we, RioHAnn J. Ronio and ,CLAUVDE L. QROULO, citizens of the United States, residing ,Qallani in the county of Alameda and State .lof California, have invented new and vuseful lImprovements in .Safety Appliances for Elevators of which the following is a specification,

This invention relates to satety appliances for elevators and particularly' ,pertains to means for looking the .elevator naneentrol mechanism against wmovement when the elevator `shaft door is in an :open position.

It is an object of :this invention to provide a safety mechanism adapted `lto he mounted Wit/thin an elevator car and Vto he actuated to prevent the application off power to the .car when the elevator A.shaft door is open.

Another object iS 130 provide a gravity ope-rated controller lever loch which is -posif t-.ve in its Joperation .and which may' he 12nstantl-y released by the movement of theelevator shaft door to allow `the .car :to he moved.

Another ,object is i0 ployole 2 1 looking mechanism which will act positively to lock the controller lever against y@novenaenit even though 4the `means by which the lock is lactuated by the movement ,of the 1elevator shaft door have become inoperative.

It is a further object to provide a lcontroller lock for elevators which is simple-in its construction and .operation ,and which may lhe read-ily applied to 4the controller mechanism vof most yelevators new in aise.

Other .objects will vappear hereinafter- The invention is `illustrated the accom?.

panying drawings in 'which:

Figure il lis .a view 1n elevation s.of e flingmentary portion of .an elevator ce1 and the shaft within which 4it :is mounted, the car being .shown insection and the .elevator ,eolitroljling mechanism removed to show :the connection between fthe ,controller handle and .the locking mechanism.

Fig. 2 Yis .a .view in .horizontal section as seen on the `line 2-2 of Fig. land viewed in the .direction indicated by the arrows, Sho-W- ing vthe vcam :bar mounted npon 1the ,door and the releasing mechanism with which .it engages :to :actuate the locking device.

Fig. 3 is a view in detail showing the controller .and 7theycontroliler lever and their correlation with the loclll mechanism.

Fig. 4 is a view in vertica section as seen on lthe rline 1 -t of Fig. .viewed .in the ,die

rection ,of the arrows, showing the correlaf tion between the looking Inernhere and the controller lever. v

Referring to the drawings more partienlarly, 1.0 indicates a wall of van elevator shaft which is .provided with floor-ways., Aone of which is here shown as closed by a sliding door ill. The :door is suspended from 2a horizontal track l2 by means of hangers 1 and -14 which provide suitable hearings .for track rollers l5 and 16. An elevator car 17 `is suitably suspended within the `sha-ift and is adapted to he raised and ylowered by' a Ipower .olea/'ating mechanism not shown in the drawings The elevating ineohonsm is controlled by ai contro-lier .18 .Inoiinted within the en and aoinated hv a .Controller loner 119 having a suitable hand-grip '.20 e111 of the vfoiegoing parte are oi eonnnon eonoirnotion and need not `he .altered io .cooperate with the Looking mechanism to whio'li the Present .invention pertains- 'The locking means here lprovided is .adaptf ed not inn oooperotive manner between the sglidable ,door V11 `and vthe controller le- .ver 1 9. The mechanism here .shown cons-ists of ,a locking .sector 12,1 Ypivoted upon azpin 22 to the weil 23 of theeflevaioi woor This sector substantially Isemi-circnlar in shape and is fiormed with a locking notch 24 which is :disposed upon the center 'line of @the sector and hes along the Monate .ieee of the, 4eeotoi- The sector 2l `is formed with a radial-ly :exitending inn 25 whoh is .fitted with n hair oi lever ene-aging ini-ne 2o ond 2? whioh oef tend nernendonlar to the body of :the afin and are positiened a sufficient A*distance froml no wl 28 which is formed with ,oloohioeenei adapted .to eea-t within .the .elot 24 when .the controller lever ie its neo-irai viooeihoil, ohne. rendering the .Controller inoperative- Ths naw-1 is rivetedY noon a lPivot nin 2.9v and is formed integral with a counterweight @30 .which normally exerts Aan npward .presi sure upon the pawl and maintains it in engagement with the arcuate tace of the sector. This pawl is adapted to be relieved from the slot 24 by means ot the movement of a counterweight lever 31 which is pivotally disposed beneath the pawl and bears against the lower tace of the counterweight 30. One end ot the counterweight lever is formed with a countcrweight 32 which is of greater weight than the counterweight 30 and which will move the pawl from engagement by gravity when the actuating lever 33 is relieved from beneath it by the door actuating mechanism. This lever is formed with an arcuate end portion adapted to bear against a suitable cam face formed upon the lower side of the counterweight 32 and provided to eliminate friction from the movement of the lever 33 thereagainst.

The lever 83, which is pivotally mounted within the car, is directly lactuated by a connecting rod or cable 34 which engages one end of the lever and extends downwardly through an opening in the floor and there engages one end of a simple lever 35. This lever is pivoted beneath the floor of the car upon a suitable bracket 36 and allows movement to be transmitted from a cable or rod 37 which passes upwardly through the floor of the car and extends out through the ceiling and there engages one arm of a bellcranlr 38. the other arm of which is engaged by a rod 39 which lies substantially horizontal and engages the end of a rockercrank 40 which is pivotally secured within suitable bearings upon the root of the car and which i s directly secured to a spur gear 41 with which it is adapted to rotate and which meshes with a spur gear sector 42. The sector 42 is pivotally mounted to move horizontally upon a pivot shaft 43 and is there secured to an oscillating lever 44 upon the outer ends of which are secured rollers 45 and 46 which are adapted to be encountered by a vertically disposed cam bar 47. This bar is secured to the inner face ot the elevator shaft door 11 and it is by its movement that the entire lock operating mechanism above described is actuated. Y

The operation of the device is as follows:

Under normal conditions and when the elevator door is closed, the cam bar 47 upon the door will bear the relation to the oscillating lever 44 and its rollers as shown in Fig. 2 of the drawings. The locking mechanism mounted adjacent the controller 'may then be operated as desired as the counterweight lever 31 supports the pawl 28 thus prevent.- ing the pawl from seating within the slot 24 as the sector 21 is moved. The arrangement of the levers and the gear 41 and its sector 42 prevents the device from being overcome by the gravity ot the counterweight upon Copiel of thisY patent may be obtained for the lever 31. lVhen the door is opened, the Y cam bar 47 will encounter the roller 45 upon one end of the oscillating lever 44 and will thereby act through the various levers and connecting rods to rotate the ac-V tuating lever 33 in the direction of the arrow -a-. Vrlhis will relieve the pressure ot the couiiterweight arm from the weight 30 upon the pawl and will-thus allow it to be controlled by its own weight and tall into the slot 24 with which it must register when the elevator car is stopped.

It will'be seen that the car cannot be moved until the elevator door has imparted a movement to the oscillating lever 44 and this is done by the cam bar as it moves with the door to the closed position thereof. Upon this travel, it encounters the roller 46 and returns the gears 41 and 42 to their original position. This movement relieves the weighted end of the counterweight lever from the upward pressure ot the actuating lever 88 and again allows the pawlto be supported by the weight of the counterweight lever 31 in a position to prevent the pawl from engaging t-he slot 24 upon the sector 21.

VIt will thus be seen that the elevator locking device herein disclosed is simple and positive in its operation and that it willV eilectively lock the control mechanismV of Y the elevator car against manipulation While the elevator shaft door is open and willY only release it upon the return of the door r to its closed position. Vhat we claim is:

1. In a controller loclr Jfor elevators, the

combination of a pivoted controller lever, a pivoted member having an arcuate edge formed with a locking notch, a pair of spaced pins carried by said pivoted member extending on opposite sides ofthe lever,

a pawl positioned to engage the notch when I the lever is in an intermediate position, andV the lever is in an intermediate position, Y means for normally holding said pawl out` 1 of engagement with the notch, means controlled from a remote point for releasing said pawl, and gravity means for actuating the pawl.

In testimony whereof we have signed our Y names to this speciiication.

RICHARD J. ROULO. CLAUDE L. ROULO.

ve cents each, by addressing the Commissioner of Eatents, Washington, n Gs 

